Nice pictures, they very much illuminate what you mean by the atheletic approach to receiving a push, but I'm curious as to how would you draw these again for the person in the diagram where the angle of force that will be applied is not known in advance of its arrival?

(Maybe draw a blindfold on the man so he can't see?)

I'm interested to see! (I'm leaving my blindfold off...)

I'm not sure what this has to do with force once it's inside of the body? If you couldn't feel force, I would agree with you, but if you are moving around you can feel things.

I guess you're making a point about 'omnidirectional stability'. Which is an interesting concepts. How do we make that happen?